-1 -1 0 1 1   bas1
-1 1 1 0 -1   bas2
8 1
-1 0 0 0 1 
-1 0 1 0 1 
0 0 0 0 0 
0 0 0 0 1 
0 0 1 0 0 
0 1 0 0 0 
0 -1 0 0 1 
1 0 0 0 0 
